Q1.Sunil did na survey among his friends to find out which channel they like to watch the most. Planet Earth Geographical Channel Cartoon News Music 40 50 60 20 30 Represent the data in the form of pie chart.
Answers
Answer:
Data: Data is a collection of numbers. They are gathered and organised to give some information. Data put in their original form as they are collected are raw data.
Observation: Each of the value in the raw data is an observation.
Types of Data
Data are collected on the basis of requirement or the needed information. Data are mainly of two types – primary and secondary data.
Primary Data: The data collected directly from the source is primary data. Suppose when you need to collect data for the favourite game of your classmates. You ask them directly. This is the primary data.
Secondary Data: The collection of data indirectly or from some external source is the secondary data. These sources can be newspapers, magazines, television, internet etc. Suppose if you have to collect the data on the number of branches of your favourite restaurant in different cities. You may collect the data from newspapers or the internet. Such data is the secondary data.